CVE-2026-54306 — n8n: Prototype Pollution enables confused-deputy execution via public webhooks

Description (CNA)

n8n is an open source workflow automation platform. Prior to 2.25.7 and 2.26.2, a prototype pollution vulnerability allowed a crafted public webhook payload to inject attacker-controlled fields into workflow data during internal object copying. These fields could be surfaced and consumed as normal values by downstream built-in nodes. Where a workflow combines a public webhook with action nodes that consume the resulting fields, an attacker could cause the workflow to act as a confused deputy — targeting unintended records or issuing outbound requests using the workflow owner's configured credentials. This vulnerability is fixed in 2.25.7 and 2.26.2.

Affected (CNA)

Vendor / product	Versions
n8n-io / n8n	affected >= 2.26.0, < 2.26.2; affected < 2.25.7

CWE

CWE-1321

References

https://github.com/n8n-io/n8n/security/advisories/GHSA-2vff-hj5x-8gq7

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.